. Bulletin of the British Ornithologists' Club. 89 [Bull. 1979: 99(3)] northeastern Zambia was apparently identical to that of montane B. mariae of the somhern highlands of Tanzania and of ufipae in the Mbisi Forest. These Zambian birds responded actively to playbacks of the recorded song of mariae from southwestern Tanzania. jB. c. nyassae of southwestern Tanzania has a song very different from that of B. mariae, with which it is locally sympatric, and tape recordings of nyassae produced no response from the birds tested in northeastern Zambia at Mbala. At first Stjernstedt thought tha
. Bulletin of the British Ornithologists' Club. 89 [Bull. 1979: 99(3)] northeastern Zambia was apparently identical to that of montane B. mariae of the somhern highlands of Tanzania and of ufipae in the Mbisi Forest. These Zambian birds responded actively to playbacks of the recorded song of mariae from southwestern Tanzania. jB. c. nyassae of southwestern Tanzania has a song very different from that of B. mariae, with which it is locally sympatric, and tape recordings of nyassae produced no response from the birds tested in northeastern Zambia at Mbala. At first Stjernstedt thought that the song of B. cinnamomeus must diverge where the species occurs sympatrically with B. mariae, but this is 8«i Khz \ ~\. !_, 1 sec v. ^ B. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original British Ornithologists' Club. London : British Ornithologists' Club
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